Globorotalia tumida


Classification: pf_cenozoic -> Globorotaliidae -> Globorotalia -> tumida lineage -> Globorotalia tumida
Sister taxa: G. ungulata, G. flexuosa, G. tumida, G. plesiotumida, G. merotumida,

Taxonomy

Citation: Globorotalia tumida (Brady, 1877)
Rank: species
Basionym: Pulvinulina menardii var. tumida Brady, 1877
Synonyms:

Catalog entries: Pulvinulina menardii tumida

Type images:

Distinguishing features: Large swolllen (tumid) test, with exceptionally heavy keel, and rapidly opening spire. Tear-drop lateral shell outline. Larger and more tumid than G. plesiotumida

NB These concise distinguishing features statements are used in the tables of daughter-taxa to act as quick summaries of the differences between e.g. species of one genus.
They are being edited as the site is developed and comments on them are especially welcome.

Description


Diagnostic characters: Biconvex tumid test, trochospiral, ovate periphery with keel

Aperture: Interiomarginal umbilical-extraumbilical low arch covered by plate-like lip [Aze 2011, based on Kennett & Srinivasan 1983]

Coiling direction (in extant population): sinistral


Wall type: Non-spinose; Smooth [Aze 2011]

Test morphology: Test large, trochospiral, biconvex, spiral side more convex than umbilical side, equatorial periphery ovate, slightly lobulate; axial periphery acute with a heavy keel; 5 to 6 wedge-shaped chambers in the final whorl, increasing slowly in size as added; spiral sutures limbate, slightly raised, curved obliquely backward, merging with keel (PI. 36, Fig. 1). Umbilical sutures radial, depressed; surface densely and coarsely perforate with pores of uniform sizes (PI.36,Fig.2), except for pustulate area on umbilical and spiral side. Umbilicus narrow, deep; aperture interiomarginal, extraumbilical-umbilical, a low arch covered by a large plate-like lip. [Kennett & Srinivasan 1983]

Size: >250µm

Character matrix

test outline:Ovatechamber arrangement:Trochospiraledge view:Inequally biconvexaperture:Umbilical-extraumbilical
sp chamber shape:Crescenticcoiling axis:Lowperiphery:Single keelaperture border:Thin flange
umb chbr shape:Subtriangularumbilicus:Narrowperiph margin shape:Subangularaccessory apertures:None
spiral sutures:Raisedumb depth:Shallowwall texture:Smoothshell porosity:Macroperforate: >2.5µm
umbilical or test sutures:Weakly depressedfinal-whorl chambers:5.0-6.0 N.B. These characters are used for advanced search. N/A - not applicable

Biogeography and Palaeobiology


Geographic distribution: Tropical [Kennett & Srinivasan 1983] Low latitudes [Aze et al. 2011, based on Kennett & Srinivasan (1983)]

In modern oceans a common, warm water, species [SCOR WG138]


Isotope paleobiology: Aze et al. 2011 ecogroup 3 - Open ocean thermocline. Based on light ∂13C and relatively heavy ∂18O Cited sources (Aze et al. 2011 appendix S3): Pearson & Shackleton (1995); D. R. M. Stewart unpublished data

Phylogenetic relations: Gr. (Gr.) tumida tumida is marked by its large tumid test, exceptionally heavy keel, and rapidly opening spire. Gr. (Gr.) tumida tumida resembles Gr. (Gr.) ungulata, but the latter has a very thin, delicate test and finely perforate surface ultrastructure with flat, smooth-interpore area (PI. 36, Figs. 3,4). In Gr. (Gr.) tumida tumida, however, the surface is penetrated by large pores, lacking the flat, smooth interpore area (PI. 36, Figs. 1,2). [Kennett & Srinivasan 1983]. Molecular Genotypes recognised (data from PFR2 database, June 2017), one genotype only from 18sequences. References: André et al. 2014.

Most likely ancestor: Globorotalia plesiotumida - at confidence level 3 (out of 5). Data source: Kennett & Srinivasan 1983, fig 17;Stewart 2003 fig. 6.10; Aze et al. 2011, appendix 5.
Likely descendants: Globorotalia flexuosa; Globorotalia ungulata;

Biostratigraphic distribution

Geological Range:
Notes: First occurence occurs approx 100ka later in the Pacific than the Atlantic (Wade et al. 2011) Berggren (1973) and Fleisher (1974) considered the first appearance of Gr. (Gr.) tumida tumida at the base of Zone N18 to be a useful criterion for recognition of the Miocene- Pliocene boundary. [Kennett & Srinivasan 1983]
Last occurrence (top): Extant Data source: present in the plankton (SCOR WG138)
First occurrence (base): at base of PL1 [Atl.] zone (0% up, 5.7Ma, in Messinian stage). Data source: Wade et al. (2011), zonal marker event

Plot of occurrence data:

Primary source for this page: Kennett & Srinivasan 1983, p.158

References:

André, A. et al. (2014). SSU rDNA Divergence in Planktonic Foraminifera: Molecular Taxonomy and Biogeographic Implications. PLoS One. 9: e104641-. gs

Aze, T. et al. (2011). A phylogeny of Cenozoic macroperforate planktonic foraminifera from fossil data. Biological Reviews. 86: 900-927. gs

Banner, F. T. & Blow, W. H. (1967). The origin, evolution and taxonomy of the foraminiferal genus Pulleniatina Cushman, 1927. Micropaleontology. 13(2): 133-162. gs

Blow, W. H. (1969). Late middle Eocene to Recent planktonic foraminiferal biostratigraphy. In, Bronnimann, P. & Renz, H. H. (eds) Proceedings of the First International Conference on Planktonic Microfossils, Geneva, 1967. E J Brill, Leiden 380-381. gs

Brady, H. B. (1877). Supplementary note on the foraminifera of the Chalk (?) of the New Britain group. Geological Magazine. 4(12): 534-536. gs

Kennett, J. P. & Srinivasan, M. S. (1983). Neogene Planktonic Foraminifera. Hutchinson Ross Publishing Co., Stroudsburg, Pennsylvania. 1-265. gs

Loeblich, A. & Tappan, H. (1994). Foraminifera of the Sahul shelf and Timor Sea. Cushman Foundation for Foraminiferal Research, Special Publication. 31: 1-661. gs

Norris, R. D. (1998). Planktonic foraminifer biostratigraphy: Eastern Equatorial Atlantic. Proceedings of the Ocean Drilling Program, Scientific Results. 159: 445-479. gs

Pearson, P. N. & Shackleton, N. J. (1995). Neogene multispecies planktonic foraminifer stable isotope record, Site 871, Limalok Guyot. Proceedings of the Ocean Drilling Program, Scientific Results. 401-410. gs

Postuma, J. A. (1971). Manual of planktonic foraminifera. Elsevier for Shell Group, The Hague. 1-406. gs

Stewart, D. R. M. I. (2003). Evolution of Neogene globorotaliid foraminifera and Micoene climate change. In, p269 (ed.) . Earth Sciences. 1-269. gs

Wade, B. S., Pearson, P. N., Berggren, W. A. & Pälike, H. (2011). Review and revision of Cenozoic tropical planktonic foraminiferal biostratigraphy and calibration to the geomagnetic polarity and astronomical time scale. Earth-Science Reviews. 104: 111-142. gs


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Globorotalia tumida compiled by the pforams@mikrotax project team viewed: 26-1-2020

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